Typical precision forging technology

Precision forging refers to the forming technology that only needs a small amount of processing or no longer processing to meet the dimensional accuracy requirements of the parts after the parts are forged and formed. There are two main ways to achieve precision forging forming: refining the blank, that is, directly forging the blank that meets the requirements of precision machining. Precision forgings, the whole or some parts of the parts are directly processed by the precision forging process, so as to reduce the amount of machining. At present, there are many precision forging processes used in production. According to the different forming temperatures, it can be divided into hot precision forging, cold precision forging, warm precision forging, composite precision forging, etc.

1. Hot precision forging process

Hot precision forging refers to the precision forging process that is forged above the recrystallization temperature. Because of the high deformation temperature, the deformation resistance of the material during forging, and the good plasticity, it is easy to form parts with complex geometries.

2. Cold precision forging process

Cold precision forging is a precision forging forming technology that is forged at room temperature. Due to the room temperature forming, to avoid the size error caused by thermal expansion and contraction, the shape and size of the workpiece of cold precision forging are easy to control, and the surface of the forging does not produce oxidation and burning, etc., and has a high surface quality, so the forging accuracy of hot precision forging and warm precision forging is lower than that of cold precision forging.

3. Warm precision forging process

Warm forging is a precision forging technology in which the metal is heated to a suitable temperature below the recrystallization temperature. It has the advantages of hot forging and cold forging at the same time to avoid their defects, effectively reduce the load of equipment and molds, improve the plasticity and fluidity of metal, and do not need forging annealing.

4. Compound precision forging process

Composite precision forging process is a forging technology that combines cold, warm and hot forging processes to complete a workpiece forging, which can give full play to the advantages of cold, warm and hot forging and avoid the shortcomings of cold, warm and hot forging. At the same time, the mechanical properties, dimensional accuracy and surface quality of the parts produced by the composite precision forging process are improved compared with the parts produced by the single forging technology. At present, the commonly used composite precision forging processes mainly include warm forging - cold finishing, hot forging - cold forging, warm extrusion - cold swing rolling, warm precision forging - cold extrusion, hot precision forging - cold swing rolling, etc.